I don't think the admin's made SRB2 for mac. But i have, it doesn't work on my mac because its a blue & white g3. And i need a g4. So i use my PC for SRB2. Mystic-realm should work on SRB2 mac. Just put Mrealm in you're folder with SRB2 and open SRB2. Now wen it's on open the console (with the ~ button) and type "addfile XX.wad". Were the XX is put the name of the wad. But you already know that don't you. Well thats all i have to say